Amr bin Dinar عمرو بن دينار الأثرم الجمحي · The Book of Fasting

"When you see the crescent then fast, and when you crescent then fast, and when you see it, stop fasting. If it is obscured from you (too cloudy), then fast thirty days."

" I heard the messenger of Allah say: 'When you see the crescent then fast, and when you see it, then stop fasting, and if it is obscured from you (too cloudy), then work it out (fro the beginning of the month, to complete thirty days)"'

That they traveled with the Messenger of Allah. Some fasted and some did not, and those who were fasting did not criticize those who were not, and those who were not fasting did not criticize those who were.

"There is no fast for the one who does not intend to fast before dawn.

'Amr said: "I spoke to the Prophet and he said: 'Fast one day out of ten and you will have the reward of the other nine.' I said: 'I am able to do more than that.' He said: 'Fast one day out of eight and you will have the reward of the other eight.' I said: 'I am able to do more than that.' He said: 'Fast one day out of eight and you will have the reward of the…